WO2021232631A1

WO2021232631A1 - Dielectric phase shifter and 5g base station antenna

Info

Publication number: WO2021232631A1
Application number: PCT/CN2020/115139
Authority: WO
Inventors: 王胜; 潘利君; 范雄辉; 张申科; 孙彦明; 吴卫华
Original assignee: 中信科移动通信技术股份有限公司
Priority date: 2020-05-20
Filing date: 2020-09-14
Publication date: 2021-11-25
Also published as: CN111585024B; CN111585024A

Abstract

The present application relates to the technical field of mobile communication base station antennas, and discloses a dielectric phase shifter and a 5G base station antenna. The dielectric phase shifter comprises a stripline PCB, a first dielectric plate, a second dielectric plate and a cavity having one open end; two opposite side faces of the stripline PCB are each provided with a copper foil wire, the start point and the end point of each copper foil wire being located at the same end of the stripline PCB; the stripline PCB is fixedly mounted inside the cavity; and the first dielectric plate and the second dielectric plate which are clamped at two sides of the stripline PCB are slidably mounted inside the cavity. The dielectric phase shifter provided in the present application has a large phase shift amount and a small volume, is easy to mount, and can achieve vertical mounting, thereby reducing the size of laterally occupied space and facilitating flexible layout.

Description

Dielectric phase shifter and 5G base station antenna

Cross-references to related applications

This application claims the priority of the Chinese patent application filed on May 20, 2020 with the application number 202010431618.9 and the invention title of "Dielectric Phase Shifter and 5G Base Station Antenna", which is fully incorporated herein by reference.

Technical field

This application relates to the technical field of mobile communication base station antennas, in particular to a medium phase shifter and a 5G base station antenna.

Background technique

Electrically adjustable antenna technology is a common requirement in mobile communication systems. This technology is used to timely change the phase of each transmitting element of the antenna array to adjust the vertical beam direction of a certain antenna, thereby controlling the range of communication signals.

This technique is mainly implemented by a phase shifter that can be used to adjust the phase of the output signal. Under the control of an external control source, the phase shifter can change the phase of one input signal and distribute it to multiple branch output ports by moving one of its own components, thereby changing the phase of the signal transmitted to the transmitting element to realize the beam Downward adjustment. The rapid development of mobile communication technology puts forward higher requirements for phase shifters, such as good broadband matching characteristics.

In the prior art, conventional electronically adjustable antennas widely use phase shifters with a cavity strip line structure, which are mounted on the antenna reflector with plastic buckles or metal structural parts. This method of installation requires high strength of the structural parts and occupies The space location is large, and the antenna layout is not flexible.

Summary of the invention

The embodiments of the present application provide a dielectric phase shifter and a 5G base station antenna to solve or partially solve the problem of the existing dielectric phase shifter occupying a large space.

In the first aspect, an embodiment of the present application provides a dielectric phase shifter, including: a stripline PCB, a first dielectric board, a second dielectric board, and a cavity with an open end at one end;

Two opposite sides of the stripline PCB are provided with copper foil lines, and the starting point and the end point of the copper foil line are located at the same end of the stripline PCB;

The stripline PCB is fixedly installed inside the cavity; the first dielectric board and the second dielectric board clamped on both sides of the stripline PCB are slidably mounted on the cavity internal.

On the basis of the above technical solution, a plurality of first protrusions are provided on the side of the first medium plate facing the inner wall of the cavity, and/or on the second medium plate facing the cavity One side of the inner wall of the body is provided with a plurality of second protrusions, and the first medium plate and the second medium plate can reciprocate simultaneously.

On the basis of the above technical solution, the strip line PCB is provided with a sliding groove provided through the strip line PCB, and the first dielectric board and the second dielectric board pass through the sliding groove. The connecting pieces are connected.

On the basis of the above technical solution, at least one first matching groove is provided on the first medium plate, and/or at least one through hole is provided on the second medium plate. A second matching groove provided on the second medium plate.

On the basis of the above technical solution, the end of the first medium plate is provided with a first medium head, and the end of the second medium plate is provided with a second medium head. The first media head and the second media head are used for connecting with the transmission member.

On the basis of the above technical solution, the medium phase shifter further includes a transmission adapter connected with the transmission member, the first medium head and the second medium head are both provided with through holes, and the transmission The adapter is configured with a connecting shaft that matches the through hole.

On the basis of the above technical solution, the stripline PCB has an L-shaped structure, and the bottom of the cavity is provided with an avoidance groove adapted to the stripline PCB.

On the basis of the above technical solution, a rectangular slot for limiting the strip line PCB is provided in the cavity.

On the basis of the above technical solution, a plurality of welding feet are integrally installed at the bottom of the cavity, and the extending direction of the welding feet is the same as the length direction of the rectangular groove.

In the second aspect, an embodiment of the present application provides a 5G base station antenna, including: the dielectric phase shifter described in the foregoing technical solutions.

The dielectric phase shifter and the 5G base station antenna provided by the embodiments of the present application, through the synchronous reciprocating movement of the first dielectric plate and the second dielectric plate, that is, the first dielectric plate and the second dielectric plate move from the inside of the cavity to the cavity At this time, the first dielectric plate and the second dielectric plate have not completely left the inside of the cavity. The parts of the first and second dielectric plates are still inside the cavity, passing through the first and second dielectric plates. The relative movement between the dielectric board and the stripline PCB can improve a variety of performance indicators. The medium phase shifter provided by the embodiment of the present application has a large phase shift amount, a small volume, and is easy to install, and can realize vertical installation, thereby reducing the horizontal occupation size and being beneficial to flexible layout.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is an exploded schematic diagram of a dielectric phase shifter according to an embodiment of the application;

FIG. 2 is a schematic diagram of the structure of a cavity according to an embodiment of the application;

3 is a schematic side view of the cavity of the embodiment of the application;

4 is a schematic diagram of the structure of a stripline PCB according to an embodiment of the application;

FIG. 5 is a schematic structural diagram of a first dielectric plate according to an embodiment of the application;

Fig. 6 is a schematic structural diagram of a second dielectric plate according to an embodiment of the application;

Fig. 7 is a schematic structural diagram of a transmission adapter according to an embodiment of the application.

Reference signs:

1. Cavity; 101, soldering feet; 102, avoidance slot; 103, rectangular slot; 2. Strip line PCB; 201, copper foil wire; 202, chute; 203, rectangular pad; 3. First medium Plate; 301, mounting hole; 302, the first medium head; 303, the first through hole; 304, the first protrusion; 305, the first matching groove; 4. the second medium plate; 401, the mounting shaft; 402, the first Two media heads; 403, second through hole; 404, second matching groove; 5. transmission adapter; 501, connecting shaft; 502, assembly hole; 503, reinforcing rib.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.

Fig. 1 is an exploded schematic diagram of a dielectric phase shifter according to an embodiment of the application. As shown in Fig. 1, the dielectric phase shifter according to an embodiment of the present application includes: a stripline PCB2, a first dielectric plate 3, and a second dielectric A plate 4 and a cavity 1 with an opening at one end;

The cavity 1 can be made of metal materials. The cavity 1 can be a rectangular parallelepiped structure. One end of the cavity 1 is arranged with an open opening. The cavity 1 is provided with a stripline PCB2, a first dielectric board 3, and The accommodating cavity of the second dielectric plate 4, that is, the accommodating cavity communicates with the outside;

The two opposite sides of the stripline PCB2 are both provided with copper foil lines 201, and the start and end points of the copper foil line 201 are located at the same end of the stripline PCB2; among them, the start and end points of the copper foil line 201 are both set There are rectangular pads 203, multiple rectangular pads 203 are located on the strip line PCB2 close to the open end of the cavity 1; through the rectangular pad 203 and the 5G antenna PCB for welding, the electrical connection between the two can be achieved;

The stripline PCB2 is fixedly installed inside the cavity 1; the first dielectric board 3 and the second dielectric board 4 clamped on both sides of the stripline PCB2 are slidably installed inside the cavity 1. The first dielectric board 3 and The second medium plate 4 can move to the outside of the cavity 1.

It should be noted that the stripline PCB2, the first dielectric board 3 and the second dielectric board 4 are all vertically arranged inside the cavity 1, and the stripline PCB2, the first dielectric board 3 and the second dielectric board 4 are all parallel. In the arrangement, the first dielectric board 3 is located on one side of the stripline PCB2, and the second dielectric board 4 is located on the other side of the stripline PCB2. That is, the first dielectric board 3, the stripline PCB2, and the second dielectric board 4 are sequentially arranged along the width direction of the cavity 1.

In the embodiment of the present application, through the synchronous reciprocating movement of the first medium plate 3 and the second medium plate 4, that is, the first medium plate 3 and the second medium plate 4 move from the inside of the cavity 1 to the outside of the cavity 1, At this time, the first medium plate 3 and the second medium plate 4 have not completely left the inside of the cavity 1, and the parts of the first medium plate 3 and the second medium plate 4 are still inside the cavity 1, passing through the first medium plate 3. The relative movement between the second dielectric board 4 and the stripline PCB2 can improve various performance indicators. The dielectric phase shifter provided by the embodiment of the present application has a large phase shift amount, a small volume, and is easy to install, and can be installed vertically, thereby reducing the horizontal occupation size and being beneficial to flexible layout.

On the basis of the above embodiment, as shown in Figures 5 and 6, a plurality of first protrusions 304 are provided on the side of the first medium plate 3 facing the inner wall of the cavity 1, and/or on the second medium plate 3 A plurality of second protrusions (not shown in the figure) are provided on the side of the plate 4 facing the inner wall of the cavity 1, and the first medium plate 3 and the second medium plate 4 can reciprocate at the same time.

In the embodiment of the present application, the side of the first dielectric board 3 facing the stripline PCB2 is a smooth surface, and the side of the second dielectric board 4 facing the stripline PCB2 is a smooth surface. The first protrusion 304 is in contact with the inner wall of the cavity 1 when the first medium plate 3 is sliding, and the second protrusion is in contact with the inner wall of the cavity 1 when the second medium plate 4 is sliding, and passes through the first medium plate. The first protrusion 304 on the 3 and the second protrusion on the second dielectric board 4 make the first dielectric board 3 and the second dielectric board 4 better fit the stripline PCB during the sliding process to ensure performance The stability.

On the basis of the above-mentioned embodiment, the stripline PCB2 is provided with a sliding groove 202 that penetrates the stripline PCB2, and the first dielectric board 3 and the second dielectric board 4 are connected by a connecting member that crosses the sliding groove 202.

In the embodiment of the present application, the sliding groove 202 is formed by extending along the length direction of the strip line PCB2. The first medium plate 3 and the second medium plate 4 are connected by a connecting piece crossing the chute 202, that is, one end of the connecting piece is connected with the smooth surface on the first medium plate 3, and the other end of the connecting piece is connected with the second medium plate 4 The smooth surface of the upper part is connected. The connecting piece can be a round rod. Wherein, the mechanical stroke of the medium phase shifter can be controlled by changing the length of the chute 202, that is, the displacement of the relative movement between the first medium plate 3 and the second medium plate 4 and the stripline PCB2.

It can be understood that, in order to realize the synchronous movement of the first dielectric plate 3 and the second dielectric plate 4, there may be multiple implementation manners. For example, a mounting hole 301 is provided on the smooth surface of the first medium plate 3, and a mounting shaft 401 that is adapted to the mounting hole 301 is provided on the smooth surface of the second medium plate 4. The mounting shaft 401 and the second The smooth surface of the medium plate 4 is perpendicular to each other, and the mounting shaft 401 passes through the sliding groove 202 and then is assembled with the mounting hole 301 to realize the synchronous movement of the first medium plate 3 and the second medium plate 4.

On the basis of the above-mentioned embodiment, at least one first matching groove 305 is provided on the first dielectric plate 3 to penetrate through the first dielectric plate 3, and/or at least one through second matching groove 305 is provided on the second dielectric plate 4 The second matching groove 404 is provided on the medium board 4.

It should be noted that the first matching grooves 305 are arranged along the width direction of the first dielectric plate 3 and the second matching grooves 404 are arranged along the width direction of the second dielectric plate 4. For example, a U-shaped first matching groove 305 is formed from the upper edge of the first dielectric plate 3 downward, and another U-shaped first matching groove 305 is formed upward from the lower edge of the first dielectric plate 3 305, the two first matching grooves 305 are arranged symmetrically. Various performance indicators can be improved by providing the first matching slot 305 and the second matching slot 404.

On the basis of the above-mentioned embodiment, the end of the first medium plate 3 is provided with a first medium head 302, and the end of the second medium plate 4 is provided with a second medium head 402. The first medium is located outside the cavity 1. The head 302 and the second media head 402 are used for connecting with the transmission member.

It should be noted that the first media head 302 and the second media head 402 may have a rectangular structure. The first medium head 302 is vertically connected to the upper end of the first medium plate 3, and the second medium head 402 is vertically connected to the lower end of the second medium plate 4. The first media head 302 and the second media head 402 are arranged in parallel. When the first media board 3 and the second media board 4 are installed on both sides of the stripline PCB2, the first media head 302 and the second media head 402 overlap area. By connecting the first dielectric head 302 and the second dielectric head 402 with the transmission member of the 5G antenna, the reciprocating movement of the first dielectric plate 3 and the second dielectric plate 4 can be realized.

On the basis of the above-mentioned embodiment, as shown in Fig. 7, the medium phase shifter further includes a transmission adapter 5 connected with the transmission member. The connecting piece 5 is configured with a connecting shaft 501 that is adapted to the through hole.

It should be noted that, for ease of description, the through hole on the first dielectric head 302 is named the first through hole 303, and the through hole on the second dielectric head 402 is named the second through hole 403. The transmission adapter 5 includes a Z-shaped body. One bottom surface of the Z-shaped body is provided with a connecting shaft 501. The other bottom surface of the Z-shaped body is provided with an assembly hole 502 that penetrates the bottom surface. For the connection of the transmission part of the 5G antenna, when the transmission adapter 5 is assembled with the first dielectric plate 3 and the second dielectric plate 4, the connecting shaft 501 passes through the first through hole 303 and the second through hole sequentially from top to bottom 403. Among them, in order to improve the structural strength of the Z-shaped body, a reinforcing rib 503 is connected between the two bottom surfaces of the Z-shaped body.

On the basis of the foregoing embodiment, as shown in FIG. 4, the stripline PCB2 has an L-shaped structure, and the bottom of the cavity 1 is provided with an avoidance slot 102 adapted to the stripline PCB2.

It should be noted that, for ease of description, the stripline PCB2 may include a first rectangular board and a second rectangular board connected vertically. The length direction of the first rectangular plate is the same as the length direction of the cavity 1, and the width direction of the second rectangular plate is perpendicular to the length direction of the cavity 1. Wherein, the starting point and the ending point of the copper foil line 201 are both located on the bottom edge of the side of the second rectangular plate. Since the rectangular pads 203 are all located on the bottom edge of the side of the second rectangular plate, the second rectangular plate can be referred to as a protruding welding end. In order to facilitate the placement of the second rectangular plate, a relief groove 102 adapted to the second rectangular plate is provided at the bottom of the cavity 1, that is, the bottom surface of the second rectangular plate is located outside the cavity 1.

In the dielectric phase shifter provided by the embodiment of the present application, the stripline PCB2 is directly welded to the PCB of the 5G antenna through the welding end to achieve electrical connection without welding cables, ensuring batch consistency, simple process, convenient installation, and cost. Lower.

On the basis of the foregoing embodiment, as shown in FIGS. 2 and 3, a rectangular slot 103 for limiting the position of the stripline PCB 2 is provided in the cavity 1.

It should be noted that, in order to limit the strip line PCB2, a rectangular slot 103 is provided on the inner wall of the cavity, and the number of the rectangular slot 103 can be one or two. The length direction of the rectangular slot 103 is the same as the length direction of the cavity 1, and the size of the rectangular slot 103 needs to be adapted to the size of the stripline PCB2.

In the following description, the number of rectangular grooves 103 is two. For example, two rectangular grooves 103 arranged symmetrically up and down are provided on the inner wall of the cavity. The top of the stripline PCB2 is located inside one rectangular slot 103, and the bottom of the stripline PCB2 is located inside another rectangular slot 103. The limit of the rectangular slot 103 can make the stripline PCB2 always in a vertical state.

On the basis of the above embodiment, a plurality of welding feet 101 are integrally installed at the bottom of the cavity 1, and the extending direction of the welding feet 101 is the same as the length direction of the rectangular groove 103.

It should be noted that a plurality of welding feet 101 are sequentially arranged along the length direction of the cavity 1 on the bottom of the cavity 1, and the position of the welding feet 101 corresponds to the position of the rectangular groove 103.

The dielectric phase shifter provided by the embodiment of the present application adopts a direct welding method by providing an integrated welding leg 101 on the cavity 1 to reduce installation structural parts, easy to realize the assembly of the dielectric phase shifter and the 5G antenna, and the installation is simple And reliable.

On the other hand, an embodiment of the present application also provides a 5G base station antenna, and the 5G base station antenna includes the dielectric phase shifter provided in the foregoing embodiments.

In the embodiment of the present application, the transmission adapter 5 is connected with the transmission member of the 5G antenna to realize the reciprocating movement of the first dielectric plate 3 and the second dielectric plate 4; the dielectric phase shifter passes through the welding feet on the bottom of the cavity 1 101 is connected to the PCB or reflector of the 5G base station antenna; the rectangular pad 203 on the stripline PCB2 is welded to the PCB of the 5G base station antenna to realize electrical connection.

The 5G base station antenna provided by the embodiment of the present application adopts a miniaturized medium phase shifter, and through vertical installation, the horizontal occupation size of the 5G antenna is reduced, which is conducive to the flexible layout of the antenna.

The above descriptions are only the preferred embodiments of this application, and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in this application. Within the scope of protection.

Claims

A dielectric phase shifter, characterized by comprising: a stripline PCB, a first dielectric board, a second dielectric board, and a cavity with an open end at one end;

Two opposite sides of the stripline PCB are provided with copper foil lines, and the starting point and the end point of the copper foil line are located at the same end of the stripline PCB;

The stripline PCB is fixedly installed inside the cavity; the first dielectric board and the second dielectric board clamped on both sides of the stripline PCB are slidably mounted on the cavity internal.
The medium phase shifter according to claim 1, wherein a plurality of first protrusions are provided on the side of the first medium plate facing the inner wall of the cavity, and/or on the first medium plate A plurality of second protrusions are provided on the side of the two medium plates facing the inner wall of the cavity, and the first medium plate and the second medium plate can reciprocate at the same time.
The dielectric phase shifter according to claim 2, wherein the stripline PCB is provided with a sliding groove provided through the stripline PCB, and the first dielectric plate and the second dielectric The plates are connected by connecting pieces that traverse the chute.
The dielectric phase shifter according to any one of claims 1 to 3, wherein at least one first matching groove is provided on the first dielectric plate and is provided through the first dielectric plate, and/or At least one second matching groove provided through the second medium plate is provided on the second medium plate.
The dielectric phase shifter according to any one of claims 1 to 3, wherein the end of the first dielectric plate is provided with a first dielectric head, and the end of the second dielectric plate is provided with a second dielectric head. The media head, the first media head and the second media head located outside the cavity are used for connecting with a transmission member.
The medium phase shifter according to claim 5, wherein the medium phase shifter further comprises a transmission adapter connected with the transmission member, and the first medium head and the second medium head are both A through hole is provided, and a connecting shaft adapted to the through hole is configured on the transmission adapter.
The dielectric phase shifter according to any one of claims 1 to 3, wherein the stripline PCB is in an L-shaped structure, and the bottom of the cavity is provided with a structure that matches the stripline PCB. The avoidance slot.
7. The dielectric phase shifter according to claim 7, wherein a rectangular slot for limiting the stripline PCB is provided in the cavity.
8. The medium phase shifter according to claim 8, wherein a plurality of welding feet are integrally mounted on the bottom of the cavity, and the extending direction of the welding feet is the same as the length direction of the rectangular groove.
A 5G base station antenna, characterized by comprising the dielectric phase shifter according to any one of claims 1 to 9.